import cn.nukkit.entity.item.EntityXPOrb; //导入依赖的package包/类
public void dropExpOrb(Vector3 source, int exp, Vector3 motion, int delay) {
    motion = (motion == null) ? new Vector3(new java.util.Random().nextDouble() * 0.2 - 0.1, 0.2,
            new java.util.Random().nextDouble() * 0.2 - 0.1) : motion;
    CompoundTag nbt = new CompoundTag()
            .putList(new ListTag<DoubleTag>("Pos").add(new DoubleTag("", source.getX()))
                    .add(new DoubleTag("", source.getY())).add(new DoubleTag("", source.getZ())))
            .putList(new ListTag<DoubleTag>("Motion").add(new DoubleTag("", motion.getX()))
                    .add(new DoubleTag("", motion.getY())).add(new DoubleTag("", motion.getZ())))
            .putList(new ListTag<FloatTag>("Rotation").add(new FloatTag("", 0)).add(new FloatTag("", 0)));
    Entity entity = new EntityXPOrb(this.getChunk(source.getFloorX() >> 4, source.getFloorZ() >> 4), nbt);
    EntityXPOrb xpOrb = (EntityXPOrb) entity;
    xpOrb.setExp(exp);
    xpOrb.setPickupDelay(delay);
    xpOrb.saveNBT();

    xpOrb.spawnToAll();

}
 

import cn.nukkit.entity.item.EntityXPOrb; //导入依赖的package包/类
public boolean pickupEntity(Entity entity, boolean near) {
    if (!this.spawned || !this.isAlive() || !this.isOnline()) {
        return false;
    }

    entity.onCollideWithPlayer(this);

    int tick = this.getServer().getTick();

    if (pickedXPOrb < tick && entity instanceof EntityXPOrb && this.boundingBox.isVectorInside(entity)) {
        EntityXPOrb xpOrb = (EntityXPOrb) entity;
        if (xpOrb.getPickupDelay() <= 0) {
            int exp = xpOrb.getExp();
            this.addExperience(exp);
            entity.kill();
            this.getLevel().addSound(new ExperienceOrbSound(this));
            pickedXPOrb = tick;
            return true;
        }
    }

    return false;
}
 

import cn.nukkit.entity.item.EntityXPOrb; //导入依赖的package包/类
@Override
public void clean() {
	Server.getInstance().getLevels().forEach((name, level) -> Arrays.asList(level.getEntities()).forEach(entity -> {
		if (entity instanceof EntityXPOrb || entity instanceof EntityItem) entity.close();
	}));
}
 

import cn.nukkit.entity.item.EntityXPOrb; //导入依赖的package包/类
@Override
public boolean isExperienceOrb() {
    return entity instanceof EntityXPOrb;
}